# -*- coding: utf-8 -*-
import os     #导入os的标准库
os.chdir('D:\\2018python')  #设置工作目录是‘E:\\python’，且此目录必须已存在。

#import  numpy as np
#import scipy as sp
#import matplotlib.pyplot as plt   
#import pylab as pl       
#from pandas import Series, DataFrame 
#import pandas as pd

